a decree that prohibits something
"The mayor signed a ban on single-use plastics that will take effect next month."
100 bani equal 1 leu in Moldova
"The currency exchange sign clearly states that 100 bani equal 1 leu in Moldova, so I handed over the smaller bills for my purchase."
100 bani equal 1 leu in Romania
"The new currency reform means that every 100 old bani are now worth exactly 1 leu."
an official prohibition or edict against something
"The city council voted to ban single-use plastics from all local restaurants starting next month."
a bachelor's degree in nursing
"She decided to ban her friend from bringing up his failed attempt at getting a bachelor's degree in nursing during the dinner party."
Prohibition.
"The pharmacist checked the label to confirm that BAN was the correct initialism for British Approved Name before dispensing the medication."
A subdivision of currency, equal to one hundredth of a Romanian leu.
A unit measuring information or entropy based on base-ten logarithms, rather than the base-two logarithms that define the bit.
A title used in several states in central and south-eastern Europe between the 7th century and the 20th century.
Initialism of British Approved Name.
In plain English: A ban is an official order that stops someone from doing something or entering a place.
"The new drug received a ban designation after promising clinical trials."
Usage: As a noun, ban refers to an official prohibition or order forbidding a specific action or person from entering a place. Do not use it to mean British Approved Name, which is simply the acronym BAN and unrelated to restrictions.
To summon; to call out.
"The captain ban all hands to deck immediately as the storm broke over the horizon."
In plain English: To ban something means to officially stop people from doing it or having it.
"The school banned phones in the classroom."
Usage: Use "ban" only when referring to officially prohibiting or forbidding an activity, person, or item. Do not use it to mean summoning someone, which requires words like "call" or "summon."
A surname.
"The local historian proudly displayed his new book on the Ban family history, noting that their ancestors had served as judges for centuries."
The word "ban" comes from Old English and Old Norse roots meaning to summon, command, or curse. Over time, its sense shifted in English to specifically mean prohibiting something.